baber/WOPTO huggingface dataset:
Patent GB-815767-A (GB)
Title: Switching systems applicable particularly to automatic telephony
IPC: H04Q3/52
Filed: 1957-07-26
Abstract: 815,767. Electronic counting - apparatus. STANDARD TELEPHONES & CABLES Ltd. July 26, 1957 [July 31, 1956], No. 23743/57. Class 106 (1). [Also in Group XXXIX] A counting circuit uses ferro -resonant circuits as bi-stable elements. As shown, A.C. is supplied, via a condenser CC11 to a winding L120 in series with a condenser C120, the circuit being arranged to resonate on saturation, the resonant current continuing to drive the circuit into saturation. The circuit may, therefore, take on a low current unsaturating state and a high current saturating state and may be triggered from the first state to the second by a D.C. pulse applied to the left-hand winding of L120. With L120, C120 in the high current state, the output taken from across the condenser after rectification neutralizes a 6V bias to bring the cathode of rectifier d122 to earth potential. When a positive pulse is applied to lead IR the rectifier between this point and the left-hand coil of L130 is thus enabled to conduct and so trigger L130, C130 into the high current state. Capacitor CC 11 is so dimensioned that two such circuits cannot be simultaneously in the high current state so that L120, C120 reverts to the low current state. Further pulses step the counter in a similar manner. The saturable core may be replaced by two such cores whose A.C. feed windings are connected in series and whose control windings are connected in series opposition, Fig. 1A (not shown). This prevents unwanted induction of the A.C. into the control circuits.
Patent GB-1326140-A (GB)
Title: Running and braking circuit for a dc motor
IPC: H02P3/12
Filed: 1971-04-19
Abstract: 1326140 Control of D.C. motors CKD PRAHA OBOROVY PODNIK 19 April 1971 [4 April 1970] 23748/71 Heading H2J A running and braking circuit for a D.C. motor which facilitates a quick transition from running to braking by employing a scheme in which the motor acts as a series motor whilst the motor is running and as a shunt generator during braking of the motor comprises a switching circuit with two contactors. A running contactor 2 interrupts the power supply to a thyristor switch 1 in series with the motor 6, the field winding 4 and a parallel combination of a diode 5 and a braking resistance 9. For running the contactor 2 is closed and a braking contactor 3 is open and current flows in the combination described above when the switch 1 is closed. When the switch 1 is opened, after the current has reached a predetermined value, the current decays through a commutating diode 7 and the switch 1 closes once more hence maintaining the required current. For braking the motor, contactor 2 is open and contactor 3 is closed. The induced e.m.f. in the armature flows through a second diode 8, the switch 1, the field winding 4 and the contactor 3. This current has a rising characteristic and eventually opens the switch 1. The current then decays through two circuits; the field winding 4 and diode 7 with contactor 3 and the motor 6 and brake resistor 9 with contactor 3 and again the switch 1 closes hence maintaining the braking torque at the required value. A second circuit similar to the first is described with the power supply and diodes reversed.
Patent GB-463609-A (GB)
Title: Improvements in or relating to spectacles or the like
IPC: G02C7/08
Filed: 1936-08-31
Abstract: 463,609. Spectacles. TARTRAIS, E. H. Aug. 31, 1936, No. 23788. Convention date, Sept. 6, 1935. [Class 97 (i)] Apparatus for correcting visual defects comprises one or more pairs of spectacles each of which is provided with side pieces pivoted to a support by which the appaiatus is carried on the wearer's head, so that each pair of spectacles can be swung relatively to the support into or out of a position in front of the eyes. Figs. 1 and 2 show two pairs of spectacles 5, 6 mounted on pivots 1 carried by a metal band 2 held on the head by a resilient strip 3 passing through rings 4. A shown in Fig. 3, each pivot 1 may have a groove 13 receiving projections 14, 15 of washers 52, 53 separating the side pieces 16 or 17 so that the pivotal movement of one pair of spectacles does not produce any movement of another pair. The pivots may be connected to the head band by spherical or cardan joints so as to be self-aligning, and may be mounted on separate plates connected to the band by hooks &c.
Patent GB-1138173-A (GB)
Title: Improvements in or relating to the hydrolysis of 17-,20;20,21-bismethylenedioxy-pregnane compounds
IPC: C07J75/00
Filed: 1966-05-27
Abstract: 1,138,173. Hydrolysis of 17α, 20:20,21-bismethylenedioxy steroids. SYNTEX CORP. 27 May, 1966 [1 June, 1965; 29 April, 1966], No. 23797/66. Headings C2C and C2U. 17α,21 - Dihydroxy - 20 - keto - pregnanes are prepared by hydrolysing 17α,20: 20,21-bismethylenedioxypregnanes with at least 10 mols. per mol. of steroid of hydrogen fluoride or hydrogen chloride in aqueous solution of at least 20% by weight at - 30 to 25 C. The pregnanes may be of the normal; 18-alkyl; 19-nor; 10α; 9#,10α; or 4-oxa series and may contain other substituents and double bonds, e.g. 2-formyl, 11α- or 11#-hydroxy, 11-keto, 16-hydroxy or -methyl, 6-methyl or -halogen, and 9α-halogen; and 1-, 4-, 6- and 9(11)-double bonds; and [3,2-c]pyrazolo-pregnanes.
Patent GB-1158783-A (GB)
Title: Electric Motor Control System
Inventor: COTTRELL GRAHAM ANTHONY
IPC: H02P7/06
Filed: 1965-06-04
Abstract: 1,158,783. Automatic control for compressors. ENGLISH ELECTRIC CO. Ltd. Sept. 5, 1966 [June 4, 1965], No.23879/65. Heading G3R. A gas compressor 5, whose load torque varies considerably during each revolution of its shaft, is driven by a D.C. motor 6 which is energized through mercury arc converter 8. A fast-acting controller 9 for the converter compares a reference signal on line 10 with a signal representing the motor current whereby the difference between the two signals is reduced towards zero. The desired mean speed of the compressor is set by a reference signal, on line 22, which is compared in controller 20 with a signal from tachometer generator 15, the difference-signal being averaged over a period by delay unit 24 to adjust the mean level of the current reference signal on line 10 to a new value whereby the signal on line 25 is reduced towards zero. Cyclical variations in the tachometer signal are detected by differentiating unit 17 for passing signals to the reference unit 19 further to modify the reference signal on line 10 which is inverted with regard to the signal on line 18. The armature current thus varies substantially in correspondence with the cyclic variations in torque, enabling the inertia of the compressor and motor to be reduced without excessive speed variation, or to maintain the inertia at the same value whilst reducing the speed variation. The differentiating unit 17 may be omitted, the reference unit 19 being controlled only by the signal on line 25.
Patent GB-665268-A (GB)
Title: Improvements in or relating to air distributing ducts
IPC: B60H1/00
Filed: 1948-09-13
Abstract: 665,268. Vehicle heaters. EATON MANUFACTURING CO. Sept. 13, 1948 [Oct. 2, 1947], No. 24002/48. Class 137 An air distributer for controlling the air distribution from a vehicle heater 12 comprises a casing with a pair of outlet openings 16 and 18 with interconnected valves 26 and 28 operated by manual control means connected to the crank extension 38, and outlet openings 20 and 22 with valves 30 and 32 connected respecively by links 40 and 42 to the controlling mechanism for the outlet openings 16 and 18, the arrangement being such that a movement to close the valves 26 and 28 would simultaneously open the valves 30 and 32 and vice versa. The openings 16 and 18 supply heated air for a windshield defrosting device and the openings 20 and 22, one of which may be omitted, heat the passenger compartment of the vehicle. Specification 662,736 is referred to.
Patent GB-862942-A (GB)
Title: Improvements in or relating to straight-bar knitting machines
IPC: D04B11/00
Filed: 1958-07-26
Abstract: 862,942. Knitting-machines. MONK (SUTTON-IN-ASHFIELD) Ltd., S. A., MONK, S. A., and MONK, B. A. Oct. 23, 1959 [July 26, 1958], No. 24121/58. Class 74 (2). A yarn depressing member 2 is carried by a shaft 1 mounted in bearings in the narrowing machine and means, such as chain-and-sprocket mechanism 3, 4 operated by a solenoid 5, are provided to turn the shaft 1 after an article has been pressed off the needles so as to move the yarn depressing member 2 into engagement with the yarn extending between the pressed off article and the yarn guide. This ensures that when the yarn guide is moved outwardly from its finishing position to its starting position for the next article the yarn is taken in the sinker throats. The depressing member may also serve to sever the yarn and for this purpose may consist of a wire forming part of an electrical circuit which is completed at the appropriate time so as to raise the temperature of the wire to a sufficient degree to burn through the yarn. Alternatively the member 2 may comprise a member or members adapted to cut the yarn.
Patent GB-934475-A (GB)
Title: Adjustable level radio transmitter gain control
IPC: H03C1/06
Filed: 1962-06-22
Abstract: 934,475. Valve frequency selective amplifying circuits. COLLINS RADIO CO. June 22, 1962 [Oct. 31, 1961], No. 24148/62. Class 40 (6). In a radio transmitter in which grid current in the power amplifier valve is prevented by utilizing any grid current to bias back a preceding stage, a diode with variable bias is connected to the grid circuit of the power amplifier valve and used to control the power output. Modulated R.F. from balanced modulator 15 is passed over band-pass filter 17 to an I.F. amplifier 18 from which it is fed to a mixer 18, in which it is converted, by beating with R.F. from oscillator 21, to the final transmitting frequency. This is amplified in amplifier 22 and applied as drive to the grid of the final power amplifier 11, which is biased negatively from source 24 over resistor 25 and R.F. choke 26. Any grid current in the valve 11 causes voltage pulses to appear across the stator 25 which are passed by capacitor 34 and rectified by voltage-doubling rectifier network 35, 36, to develop a negative D.C. potential across capacitor 37. This biases back the I.F. amplifier 18 and so cuts down the drive. According to the invention, the anode of a diode 12 is connected to the grid of the valve 11 and its cathode to a point of adjustable potential, comprising the slider of a potentiometer 13 which is connected between the negative bias source 24 and a source of positive bias 27. Adjustment of the potentiometer 13 alters the delay bias on the diode 12 and so adjusts the point at which the valve 11 runs into grid current; this alters the corresponding drive and hence the power out. The arrangement may be applied to the stages preceding the final power output valve (Fig. 2, not shown).
Patent GB-686426-A (GB)
Title: "improvements in combined service and auxiliary disc brakes"
IPC: F16D55/14
Filed: 1950-10-03
Abstract: 686,426. Disc brakes. LAMBERT BRAKE CORPORATION. Oct. 3, 1950 [July 14, 1950], No. 24183/50. Class 103 (i). In a disc brake of the type comprising axially spaced friction disc carrier rings 10 and 11 which are adapted to be moved apart into engagement with the internal faces of a rotating drum 2 by the action of balls 13 in inclined recesses, when the rings 10 and 11 are relatively rotated as by fluid pressure actuators 15 and 16, a separate auxiliary brake actuator is provided which, when the invention is in use for vehicle brakes, may be used as a parking brake. The auxiliary brake actuator comprises a lever 23 having a forked inner arm 24 for connection to a brake actuating cable 26 and a flat outer part 27 which pivots between the discs 10, 11 on a ball 29 and on rotation forces the discs apart by means of balls 33 in inclined recesses in a similar manner to the balls 13.
Patent GB-1205887-A (GB)
Title: Improvements in closures for necked containers
Inventor: GREEN JAMES THOMAS
IPC: B65D47/12
Filed: 1968-05-21
Abstract: 1,205,887. Caps for bottles. METAL BOX CO. Ltd. 8 April, 1969 [21 May, 1968], No. 24204/68. Heading B8T. A flexible integral plastics closure for a necked container 4 has a skirt 2 with at least one annular flexible fin 5 extending around its interior and which is deformed on application of the closure, by the neck 3 of the container 4. The closure may be retained in position on the neck by snap fitting beads 6, 7 or screw threads (8, 9), Fig. 4 (not shown). Additional sealing members may be used and may be a sealing disc 10, an annular plug (12), Fig. 7 (not shown) depending from the inner face of the crown or a flexible annular claw (11), Fig. 6 (not shown), depending from the inner face of the crown and sealing on the top of the neck. The closure may include a pouring spout (13), Fig. 8 (not shown), closed and sealed by a captive cap.
Patent GB-1262048-A (GB)
Title: Endless-film viewer
Inventor: CHIASERA CARLO
IPC: G02B27/06
Filed: 1970-05-20
Abstract: 1,262,048. Film viewers. WALKER-PEN S.p.A. May 20, 1970 [May 24, 1969; April 17, 1970], No.24410/70. Heading G2A. [Also in Division B6] A viewer for an endless film-strip is in the form of an elongated casing, and may suitably be combined with a writing instrument such as a ball-point pen 15<SP>1</SP> . As shown, the casing comprises a bottom wall 14, side walls 16, 18, and a removable top cover 12. The endless film-strip 30 passes in two straight runs along the side walls 16, 18 and along a looped path at each end. At the viewing end, the film is guided round its looped path 30<SP>11</SP> by an arcuate partition 22. Light enters the device through a window 37, is reflected by an inclined mirror 39 so as to pass through the film frame located at a gate portion in partition 22, and is reflected by another inclined mirror 33 to the viewing lens 34. The film is fed by a slide 40, which is held in position by lugs 44 fixed to the bottom wall of the casing. A finger 40<SP>1</SP> on slide 40 projects through a slit 42 in cover 12, so that the slide can be operated from outside the device. A claw 46 of saw-tooth shape projects downwards from slide 40, and to change the picture being viewed, the slide is pushed to the right, Fig. 7. The claw-tooth 46 engages in a film perforation, and carries the film along. The film passes under a lug 58, to prevent it from forming an unwanted loop 56, and rides over another saw-tooth claw 52 projecting from the side wall 16. During the return stroke of the slide, claw-tooth 52 engages in a film perforation and retains the film against backward movement. Claw-tooth 46 rides over the film during this return movement, Fig.6 (not shown). A pair of sill members 48, 50 allow the film to be deflected downwards as tooth 46 rides back over the film.
Patent GB-815124-A (GB)
Title: Improvements in counter mechanisms
IPC: G06V30/224
Filed: 1956-08-09
Abstract: 815,124. Reading counters photo-electrically. REUMERMAN, T., and HELMIG, W. H. T. Aug. 9, 1956 [Aug. 22, 1955], No. 24420/56. Class 40 (3). [Also in Group XIX] Counter wheels have fields 1 carrying visually readable symbols on which are partially superimposed electrically coded symbols. The symbols may be numerals on the counter wheels of a weighing machine. The code may take the form of transparent or coloured squares 2 as in a or bars 3 as in b and c which may be read by a photo-cell measuring the amount of light received from a source through the coded symbol or sensitive to the colours of the symbol. A photographic film may be taken and read subsequently. The coded symbol may be on the same field as its corresponding visual symbol or on a different field for photo-electric reading while the visual symbol is on view. Specification 693,554, [Group XIX], is referred to.
Patent GB-615001-A (GB)
Title: Improvements in containers
IPC: A45D40/22
Filed: 1946-08-16
Abstract: 615,001. Powder and like boxes. LEVY, F. Aug. 16, 1946. No. 24457. [Class 18] [Also in Group XXV] An inset for a powder or like box comprises a plastic container b and a metal lid a, the lid having a hinge c which lies in a recess e in the container b and is pivoted about a pin, the ends of which pass through holes f at the ends of the recess e and bend over to lie in a further recess g in the underside of the container. The lid a may have a thumb-piece h, fitting into a cutaway portion j in the rim of the container. A pressed-out tongue k engages in a recess l in the container rim to hold the lid closed.
Patent GB-871935-A (GB)
Title: Improvements in or relating to pressure-reducing valves
IPC: G05D16/06
Filed: 1958-07-30
Abstract: 871,935. Valves. REGIE NATIONALE DES USINES RENAULT. July 30, 1958 [Aug. 19, 1957], No. 24542/58. Class 135. [Also in Group XXVI] A pressure reducing valve comprises a body 1 having an inlet 2 and an outlet 3 and a closure member 5 co-acting with a seat 8 in a member 12. The closure member is loaded in a valve closing direction by means of an elastic member 7. A diaphragm 22 attached to the valve member 5 by a stem 25 of a disc 24 is subjected to a pneumatic loading in a valve opening direction. The pneumatic loading is varied by the axial adjustment of a piston 30 by means of a knurled handle 33 in threaded engagement with the bottom of a cylinder member 21 screwed into the depending pipe 4 of the body 1 to clamp the diaphragm 22. Outlet pressure acts on the top side of the diaphragm 22 by means of a passage 27. Inlet pressure acts on the elastic member 7 by means of a passage 15. The diaphragm 22 is provided with upper and lower sealing lips 26 and 28 respectively. The piston 30 is also provided with a sealing ring 36 having a lip 36<SP>1</SP> which permits air at ambient pressure to enter the cylinder when the piston is at its lowermost position and before compression of the air space 29 commences. The plug 9 and the body pipe 4 are provided with safety check holes 39 and 40 respectively to emit a warning sound in the form of a hissing of air should an attempt be made to unscrew either member when the valve is loaded. Instead of the diaphragm 22 a piston may be substituted.
Patent GB-1107420-A (GB)
Title: Amplitude modulator
Inventor: TABALBA CAMILO
IPC: H03C1/36
Filed: 1967-05-26
Abstract: 1,107,420. Single balanced modulation. STANDARD TELEPHONES CABLES Ltd. 26 May, 1967, No. 24574/67. Addition to 1,005,340. Heading H3R. A single balanced modulator for feeding a balanced load comprises a long-tailed pair 3, 4 which splits the phase of a modulating signal applied to input terminals 1 and 2, the collectors of the transistors being connected to output terminals 7 and 8 through switching transistors 9 and 10 which are switched on and off simultaneously by a carrier signal applied at terminals 13 and 14. In a modification. Fig. 3 (not shown), the switching transistors 9 and 10 are replaced by a single transistor (9) connected across the collectors of the long-tailed pair; this transistor is preferably of the symmetrical type.
Patent GB-1255208-A (GB)
Title: Improvements in or relating to rotary soil working machines
IPC: A01B9/00
Filed: 1969-05-14
Abstract: 1,255,208. Rotary cultivator. VAN GEMERT N.V. 14 May, 1969 [17 May, 1968], No. 24586/69. Heading A1B. A rotary soil working machine comprises at least one digging blade 7 rotatably mounted upon a horizontal transverse axis in a frame 1, 3, 4a, 4b, the blade 7 being substantially 'L'-shaped and consisting of a substantially radial portion 7a and an adjacent portion 7b bent in axial direction, the leading cutting edge of the latter extending obliquely from the radial portion initially forwardly with respect to the sense of rotation I of the blade and then backwardly to form a single, forwardly projecting nose. A replacement blade for the machine is also provided. In an embodiment three such blades 7 are fastened to each side of a plurality of discs 6 fixed along a shaft 5, such that each axial blade portion points in the same direction. Each nose 11 formed by the oblique portions (9a, 9b), Fig. 2 (not shown), is located from the bending point 10 of the blade at a distance of about one third of the length of the axial blade portion. Skids 18 and coulters 17 may be provided on the front frame bar 2 and scraper blades 19 may be secured on the rear frame bar 3. The cutting edge of the radial blade portion 7a may be curved.
Patent GB-807414-A (GB)
Title: Improvements in or relating to apparatus for sampling liquids
Inventor: PARKER HORACE FRANK
IPC: G01N1/14
Filed: 1956-08-11
Abstract: 807,414. Vacuum apparatus for raising liquids. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. July 22, 1957 [Aug. 11, 1956], No. 24637/56. Class 102(2). [Also in Group XVIII] A sample of a liquid, particularly a radioactive liquid, is taken from a vented container 1 by first positioning a valve 5 so that a vacuum line 8 evacuates a vessel 4 ; moving the valve 5 to a second position in which the vacuum in the vessel 4 draws liquid along a pipe 2 and about half-way up a reservoir 3 ; moving the valve 5 so a third position in which atmospheric presture entering through a pipe 7 drives part of the liquid in the reservoir back to the container 1 through the pipe 2 and part along a pipe 9, through a sampling cavity 16 to flush it, and thence through a pipe 11 ; and finally removing a cap 15 so that the rubber cap of an evacuated sampling bottle can be pressed over a needle 14 to withdraw a sample from the cavity 16. A baffle pot 12 prevents liquid in the pipe 11 from siphoning into the reservoir 3 and a thimble 17 in the bottom of the reservoir ensures that only a very small quantity of an old sample is ever left in the apparatus. Specification 776,617 is referred to in the Provisional Specification.
Patent GB-759657-A (GB)
Title: Improvements in or relating to canopy harness release
IPC: B64D17/32
Filed: 1954-08-25
Abstract: 759,657. Strap fastenings. GAYLORD, J. A., and ROCKET JET ENGINEERING COR.- PORATION. Aug. 25, 1954 [Sept. 28, 1953], No. 24714/54. Class 44. A canopy harness release comprises a body 2 having a recess 8 at one end for receiving a harness member 11, a release collar 41 slidable relative to the body to and from a closed position where it covers the recess, a spring- tensioned release member normally holding the collar 41 in closed position and a safety collar 34 movable relative to the body and operating until moved to prevent actuation of the release member. As shown, two release members 26, 27 are provided, each of which is a pin slidable in the body and urged by a spring 30, 31 into an opening 43 in the collar 41 to lock it in a position where an extension covers the recess 8. The pins 26, 27 are urged in opposite directions and are released from the collar 41 by pivoted members 45, 46 provided at opposite ends of the collars for operation by a finger and thumb. The safety collar 34 butts against the release collar 41 to prevent its movement to release position and the safety collar is locked to the body by spring-pressed pins 15, 16 which engage openings 35 in the collar. Pivoted members 38, 39, identical to the members 45, 41 release the pins 15, 16. Connected to the safety collar 34 is a locking dog 32 which slides in an opening of the body. In the locked position of the safety collar, the dog prevents unlocking movement of the pins 26, 27. A spring- pressed pin 22 is in frictional contact with the locking dog.